Scary Stories project ideas
You've got thirteen spooktastic skeins inspired by the Scary Stories to Tell in the Dark trilogy -- now what?? Below are a few patterns that would look just stunning.
Note: not all of these are written for multiple colors, but with a few creative adjustments they could easily be adapted to marl, fade, or stripe the set.
Links below lead to Ravelry
Perfectionist Trap (knit) (This pattern can also work with any weight yarn)
Agate Cowl (crochet) by KnotBadBritt
Memento Mori (crochet) by Melody Martinez
Ghost Town (knit) by Carlie Perrins
Boneyard (knit) by Stephen West
Ginger Cowl (crochet) by Toni Lipsey
I Am Dragon (knit) by Alexandra Davidoff
Crochet Your Fade (crochet) by Julme Conradie
Solstice Wrap (knit) by Ambah O'Brien
Top Down Skulls (crochet) by Fille Wegler
Lift Your Spirits (crochet) by Amanda Mannas
The Insomniac (knit) by Casapinka
Gone Camping (knit) by Josh Bennett
Strychnine (knit) by MMario
Fading Guernsey (knit) by Robbie Laughlin
Hipster (knit) by Joji Locatelli
A Practical Witch Hat (knit) by tiny owl knits
Scrappy Granny Shawl (crochet) by Regina Weiss
Skulls Scarf (crochet) by Holly Bailey
Not your style? If Ravelry is accessible to you, try searching "advent" and see if anything catches your eye!
Try using the full skein as the MC in a colorwork project, with the mini skeins in gradient order as the CC!
Another suggestion: marl or fade the skeins together in a pattern that calls for similar yardage and one color. This is my favorite way to make a pattern unique and my own - and it keeps the stitching so interesting!
For some information on working with fades/graidents, Oliphant Kat has written a great primer.
If you'd like to dip into marling, Tin Can Knits has (as usual!) created a very helpful guide.